Making her RDMA red carpet debut as a solo artist, Camila Cabello stunned in a high-waisted satin white skirt and off-the-shoulder top, keeping her brunette tresses pulled back into a low ponytail.

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Witney Carson opted for powder blue, showing off her fit figure in a strapless striped dress. The Dancing With the Stars pro dancer completed her chic look with silver heels and a gold clutch.

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Moana breakout star, Auli'i Cravalho, was also in attendance, looking glam and gorgeous in a strapless red dress, silver heels and flirty ponytail.

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Noah Cyrus went with a quirkier get-up, stepping out in an updated version of the classic button-down shirt, tying the look together with a black ribbon belt and chunky stilettos.

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ET caught up with the 17-year-old singer on the red carpet, where she told us she was ecstatic to be nominated for Best New Artist.

"I'm so excited," she gushed. "This is my first time being nominated for a music award, so I'm very excited."

Miley Cyrus' younger sister also performed at the awards show, but was a bit nervous ahead of showtime. "I wasn't nervous until about 30 minutes ago in my trailer, and I started getting real cranky, and like clenching my fists a little," she explained. "I'm very nervous! It's all good nerves."

The Radio Disney Music Awards air Sunday at 7 p.m. ET on the Disney Channel.